Experimental investigation of CRC-BRB under cyclic load

循环载荷下CRC-BRB的实验研究

• 批准号: 528508-2018
• 负责人: Alam, Shahria
• 金额: $ 1.82万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=643675
• 关键词: Experimental; investigation; CRC; BRB; under

Braced frames are widely used as a lateral load resisting system in steel buildings. The proposed research deals**with a new type of buckling restrained bracing (BRB) where the steel core is supported by unbonded crumb**rubber mortar (CRM) encased in fiber reinforced plastic (FRP) sleeve. The advantage of such a bracing system**is that it will not buckle like the conventional concentric bracing system and will have much lower weight**compared to regular BRBs. Currently, there are no guidelines for manufacturing and designing such bracing**and such braced frame structures. The objective of the proposed research is to experimentally investigate the**behavior of braces. Performance of this structural element under axial cyclic loading tests will be evaluated to**determine its hysteretic behavior.**Performance-based design is becoming a standard practice for seismic design and evaluation of structures in**order to achieve a reliable and satisfactory level of performance. However, there has been no study on the**seismic performance of such braced frame structures and their elements. This research will help develop proper**understanding and knowledge about the behavior of CRM-BRB, which will eventually help us determine the**seismic performance of such braced frames. This study will assist engineers in examining the interaction**among different components of the whole braced frame system under lateral loads, and evaluate its collapse**behavior, and determine adequate section sizes and connection details. Finite element method (FEM) will also**be implemented in this study where the models of piston brace will be generated in FEM environment. This**model will be first validated with the experimental results of the brace. This study will provide**performance-based design solutions for such braced frame building structures and their elements for the**industries. The significance of this research is paramount as it directly contributes to the safety and security of**Canadian steel building infrastructure against large lateral loads like earthquakes.

支撑框架是钢结构建筑中广泛使用的抗侧力体系。提出了一种新型的屈曲约束支撑（BRB），其核心由纤维增强塑料（FRP）套管包裹的无粘结橡胶砂浆（CRM）支撑。这种支撑系统 ** 的优点是，它不会像传统的同心支撑系统那样弯曲，并且与常规的防屈曲支撑相比，其重量 ** 要轻得多。目前，没有制造和设计这种支撑和这种支撑框架结构的指导方针。本研究的目的是通过实验研究支撑的 ** 行为。将评估该结构元件在轴向循环荷载试验下的性能，以 ** 确定其滞后性能。**基于性能的设计正在成为结构抗震设计和评估的标准做法，以达到可靠和令人满意的性能水平。然而，目前还没有对这种支撑框架结构及其构件的抗震性能进行研究。这项研究将有助于发展正确的理解和知识的CRM-BRB的行为，这将最终帮助我们确定这种支撑框架的抗震性能。本研究将协助工程师研究在侧向荷载作用下整个支撑框架体系各构件之间的相互作用，评估其倒塌性能，并确定适当的截面尺寸和连接细节。有限元法（FEM）也将 ** 在这项研究中，活塞支撑模型将在有限元环境中生成。本文将首先用支撑的试验结果对该模型进行验证。本研究将为 ** 行业的此类支撑框架建筑结构及其元件提供 ** 基于性能的设计解决方案。这项研究的重要性是至关重要的，因为它直接有助于 ** 加拿大钢结构建筑基础设施的安全和保障，以抵御地震等大的横向载荷。